I'm guessing you mean in Photoshop so you would
1. click the ruler tool
2. drag it along the line you know is straight
3. on the options bar, click straighten
hope this helps :)
David did a lot of stuff he painted a lot of things that u should try
Answer:
well, their name silly!
Explanation:
their not technically the same, since C major is the flattest of them all, but, if you think about it, they're only similar due to name!